Individually Owned: 150,657
Corporate Owned: 137,281
Aircraft Accident/Incident Report
Eugene, Oregon 97402
Sunday, March 31, 1996 6:30 PST
NTSB Narrative Summary Released at Completion of Accident
The flight crew reported that as the airplane was climbing between 14,000 feet and 16,000 feet in light icing conditions, they felt a moderate shudder. The autopilot disconnected, and the airplane immediately rolled 15 degrees to the left. An emergency was declared, and the flight was diverted with no further incident. After landing, examination revealed that a section of the left wing de-icing boot had delaminated. When pressure was applied to the system, a bubble was created. When pressure was off, the delaminated plies were stretched beyond their elastic limits and would not return to the normal shape, thus creating wrinkles. Examination of the plies revealed that there was no evidence of contamination. The separation occurred between the adhesion coat and the knit fabric. The manufacturer of the boot reported that this mode of failure was consistent with an elastromeric construction that had reached the end of its useful life. The outer delaminated plies were found to be unusually durable, which resulted in a large bubble instead of the normally expected 'burst' of the outer plies.
NTSB Probable Cause Narrative
delamination of the wing de-icing boot, due to the boot reaching its life limit.
Event Information
| Type of Event | Incident |
| Event Date | 3/31/1996 |
| Event Day of the Week | Sunday |
| Time of Event | 630 |
| Event Time Zone | Pacific Standard Time |
| Event City | EUGENE |
| Event State | OREGON |
| Event Country | -- |
| Zipcode of the event site | 97402 |
| Event Date Year | 1996 |
| Event Date Month | 3 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | |
| Event Location Longitude | |
| Event Location Airport | |
| Event Location Nearest Airport ID | |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | -- |
| Weather Briefing Completeness | Unknown |
| Investigator's weather source | Pilot |
| Time of the weather observation | 0 |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | |
| Elevation of weather observation facility | 0 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 0 |
| Lowest Non-Ceiling Height | 0 |
| Sky/Lowest/Cloud Conditions | Unknown |
| Sky Condition for Lowest Ceiling | Unknown |
| Visibility Runway Visual Range (Feet) | 0 |
| Visibility Runway Visual Value (Statute Miles) | 0 |
| Visibility (Statute Miles) | 0 |
| Air Temperature at event time (in degrees celsius) | -- |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | 0 |
| Variable Wind Indicator | Unknown |
| Wind Speed (knots) | 0 |
| Wind Velocity Indicator | Unknown |
| Wind Gust Indicator | Unknown |
| Wind Gust (knots) | 0 |
| Altimeter Setting at event time (in. Hg) | -- |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | Unknown |
| METAR weather report | -- |
| Event Highest Injury | None |
| On Ground, Fatal Injuries | 0 |
| On Ground, Minor Injuries | 0 |
| On Ground, Serious Injuries | 0 |
| Injury Total Fatal | -- |
| Injury Total Minor | -- |
| Injury Total None | 27 |
| Injury Total Serious | -- |
| Injury Total All | -- |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 5018 |
| NTSB Notification Source | -- |
| NTSB Notification Date | Mar 31 1996 12:00AM |
| NTSB Notification Time | 915 |
| Fiche Number and/or location -used to find docket information | IMAGE |
| Date of most recent change to record | Dec 8 2000 9:54AM |
| User who most recently changed record | dbo |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N334PH |
| NTSB Number | SEA96IA074 |
| Missing Aircraft Indicator | N |
| Federal Aviation Reg. Part | Part 121: Air Carrier |
| Type of Flight Plan filed | IFR |
| Flight plan Was Activated? | -- |
| Damage | Minor |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Dornier |
| Aircraft Model | DO 328-100 |
| Aircraft Series Identifier | DO 328-100 |
| Aircraft Serial Number | 3012 |
| Certified Max Gross Weight | 30071 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | U.S. Registered/U.S. Soil |
| Aircraft is a homebuilt? | No |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | 34 |
| Number of Engines | 2 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Continuous Airworthiness |
| Date of Last Inspection | Mar 28 1996 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 4331 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | FIRST SECURITY BANK OF UTAH |
| Aircraft Owner Street Address | 79 SOUTH MAIN ST. |
| Aircraft Owner City | SALT LAKE CITY |
| Aircraft Owner State | UT |
| Aircraft Owner Country | |
| Aircraft Owner Zipcode | 84111 |
| Operator is an individual? | -- |
| Operator Name | HORIZON AIR |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | 5515 N.E. TRANSPORT WAY |
| Operator City | PORTLAND |
| Operator State | OR |
| Operator Country | |
| Operator Zip code | 97218 |
| Operator Code | OXCA |
| Owner has at least one certificate | Yes - certificate holder |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | Unknown |
| Operator Certificate Number | -- |
| Indicates whether an air carrier operation was scheduled or not | Scheduled |
| Indicates Domestic or International Flight | Domestic |
| Operator carrying Pax/Cargo/Mail | Passenger Only |
| Type of Flying (Per_Bus / Primary) | Unknown |
| Second Pilot on Board | Yes |
| Departure Point Same as Event | Yes |
| Departure Airport Code | EUG |
| Departure City | |
| Departure State | OR |
| Departure Country | |
| Departure Time | 600 |
| Departure Time Zone | PST |
| Destination Same as Local Flt | -- |
| Destination Airport Code | SEA |
| Destination City | SEATTLE |
| Destination State | WA |
| Destination Country | |
| Specific Phase of Flight | Climb |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Jan 2 2001 10:30AM |
| User who most recently changed record | dbo |
| Since inspection or accident | -- |
| Event Location Runway Number and Location | 0 |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |